updated decomposeEssentialMat doc

diff --git a/modules/calib3d/doc/camera_calibration_and_3d_reconstruction.rst b/modules/calib3d/doc/camera_calibration_and_3d_reconstruction.rst
index f2fbfd1..60b28cc 100644 (file)
--- a/modules/calib3d/doc/camera_calibration_and_3d_reconstruction.rst
+++ b/modules/calib3d/doc/camera_calibration_and_3d_reconstruction.rst
@@ -743,6 +743,7 @@ They are
 :math:`[R_1, -t]`,
 :math:`[R_2, t]`,
 :math:`[R_2, -t]`.
+By decomposing ``E``, you can only get the direction of the translation, so function returns unit ``t``.
 
 
 recoverPose